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@with tatie atut @ffm JAMES EDWARD THORPE, OF ERIE, PENNSYLVANIA, ASSIGNOR TO HIM- SELF AND W. J. F. LIDDELL, OF SAME PLAGE.

Letters Patent 1Y0. 64,166, dated April 23, 1867.

IMPROVEMENT IN STEAM PUMPS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JAMES EDWARD THORPE, of Erie, in the county of Erie, and State of Pennsylvania, have' invented a new and improved Steam Pump; and I do hereby declare that the following is a-full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had tothe accompanying drawings, forming part of this specification.

This invention relates to the construction and arrangement of part-s of a pumping steam engine, whereby the power of the engine is applied to better advantage than it has hitherto been in this class of engines. And the invention consistsin operating directly on the water by pistons or plungers, without the ordinary valves, and in the manner hereinafter described.

`Figure 1 represents aside elevation of the pumping engine complete.

Figure 2 is a top or plan view.

Figure is an end view, showing the pumping cylinders and interior ofthe oscillating-valve chamber.

Figure 4 is a section of fig. 3 through the line e z, showing the piston in the supply cylinder and the oscillating valve with the chamber. The pumping cylinder is turned down out of its true position in this figure in order to show the two cylinders in connection with the oscillating valve and chamber to better advantage.

Figure 5 is a top view ofthe oscillating-valve chamber with the cap off.

Figure 6 is a section of figfti, through the line'w w.

Fifvure .7 is a side view of the steam-engine valvev in the cylinder.

Figure 8 is a transverse sectionv of the same taken in the line l' fc, iig. 7.

Figures 9 andi@ represent different views of the steam-engine valve, showing the recesses therein.

Figure 11 is the plan of a horizontal section taken through the line y y, fig. 3, shoving the piston in the pumping cylinder.

Similar letters of reference indicate like parts.

A, fig. 1, is the steam cylinder; B is the steam chest; C is the pumping cylinder; D is the supply cylinder; E is the oscillating-valve chamber; F is the valve; G is the air-chamber; H is a fly-wheel; J represents the bed of the engine, which supports the whole apparatus. The steam-engine valve is of peculiar construction. It is shown in igs. T, S, 9, 10, A Bf C D. It has recesses a, which allow it to be surrounded by steam in such a manner that it is balanced by the pressure, and cavities b, which hold the steam until the valve passes the'ports, when the steam rushes into the cylinder. K is the steam valve-rod; It is moved by an arm,-L, which is attached to n. sleeve, O, on the pistou-rod of the steam and pumping engines. This arm strikes tappets a. a, which are attached to the valve-rod. and the rod is thus moved back and forth at each revolution or stroke ot' the engine. The steam enters the valve-chest at I). and is exhausted at c. The piston-rod of the steam engines and the pumping engine is one and the saine thing, with a piston for each cylinder, on each end of it. m is :i crank-shaft, which is supported across the bed J, as' seen in iig. 2. This shaft has a. crank near its lmiddle which revolves through the upper plate of the bed. It is operated by the steam engine. The momentum of the ily-wheel'H carries it oyer the (lead-centres. It has before been, stated that the arm L was attached to the piston-rofl N by a sleeve, O, iig. 1. This sleeve has on its under side two arms pp, between which the wrist-box of the crank plays. On the outer end of the crank-shaft m there is a disk or crank-wheel. 1', which 4has a wrist-pin in it on which is a box, S. As the shaft m revolves, this wrist and box move the piston-rod. of the supply cylinder D. This is done through a sliding frame,-T, which has a. slot in which the box plays the saine as the central crank-box (loes between the armsp p. The rod of the supply-cylinder piston t is attached to thissliding frame. These movements are all eii'ected by the reciprocating motion of the steam engine which revolves the shaft and ily-wheel, while the latter carries the cranks over their dead-centres, as before stated. The action of the steam engine upon the pumping cylinder is direct, both pistons being upon the same rod.-

T-he supply cylinder D has no valves. It has only simple apertures or ports for the discharge of the water from it. The piston merely passes back and forth over an aperture in the middle of the cylinder. This aperture is seen at u, iig. 3, and also in g. 4. This is the supply port of the pump, as seen in tig. 4. The water enters the cylinder D, and passes into the pumping cylinder, andthe pistnns'move in the direction of the arrows as shown in figs. 4 and 11. In the movement of the pistons in these two cylinders it must be understood that the piston in Dis at rest e. portion of the time, While the other piston, in C, is moving, and thatits stroke is much shorter. The movement of the pumping piston forces the water through D and into the chamber of the valve F. This valve F oscillates bnck and forth, according to the pressure from the pumping piston, covering the ports r 7' alternately. The water s discharged through the aperture X.

Having thu-s described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The supply cylinder D, constructed and operating substantially as described, in combination with *the pumping engine and the oscillating valve F, und chamber E.

I claim the arrangement, substantially as described, for moving the steam valve andthe piston of the supply cylinder.

JAMES EDWARD THORPE.

Witnesses:

GEO. W. GUNNISON, SAML. Z. SMITH. 

